Add swagger for gRPC REST (#7075)

* swagger gen command added

* proto file changed

* Add filter for swagger files

* Remove loop

* Add go-swagger installation

* Add swagger mixer command

* add swagger options

* remove files

* Fix swagger-combine

* Fix description

* remove unnecessary config option

* remove go-swagger dependency

* refactor

* Add proto-gen-swagger installation tool

* fix tool

* refactor

* don't push individual swagger files to repo

* refactor

* Fix doc

* move proto-swagger-gen to a separate target

* Fix permissions

* Add ibc swagger gen

* Update swagger generation doc

* cleanup

* gofmt

* refactor

* update Makefile

Co-authored-by: anilCSE <anil@vitwit.com>
Co-authored-by: Federico Kunze <federico.kunze94@gmail.com>

contrib/devtools/Makefile

@@ -115,6 +115,14 @@ else
 	@echo "protoc-gen-grpc-gateway already installed; skipping..."
 endif
 
+ifeq (, $(shell which protoc-gen-swagger))
+	@echo "Installing protoc-gen-swagger..."
+	@go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-swagger
+	@npm install -g swagger-combine
+else
+	@echo "protoc-gen-grpc-gateway already installed; skipping..."
+endif
+
 buf: buf-stamp
 
 buf-stamp: